668733728

Names of 668733728

• Cardinal: 668733728 can be written as Six hundred sixty-eight million, seven hundred thirty-three thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 6.68733728 × 10⁸

Factors of 668733728

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 168

Divisors of 668733728

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 4 8 13 16 19 26 32 38 52 61 73 76 104 122 146 152 208 244 247 292 304 361 416 488 494 584 608 722 793 949 976 988 1159 1168 1387 1444 1586 1898 1952 1976 2318 2336 2774 2888 3172 3796 3952 4453 4636 4693 5548 5776 6344 7592 7904 8906 9272 9386 11096 11552 12688 15067 15184 17812 18031 18544 18772 22021 22192 25376 26353 30134 30368 35624 36062 37088 37544 44042 44384 52706 57889 60268 71248 72124 75088 84607 88084 105412 115778 120536 142496 144248 150176 169214 176168 210824 231556 241072 286273 288496 338428 342589 352336 421648 463112 482144 572546 576992 676856 685178 704672 843296 926224 1099891 1145092 1353712 1370356 1607533 1852448 2199782 2290184 2707424 2740712 3215066 4399564 4580368 5481424 6430132 8799128 9160736 10962848 12860264 17598256 20897929 25720528 35196512 41795858 51441056 83591716 167183432 334366864 668733728
• Sum of all divisors σ(n): 1541760696
• Sum of proper divisors (its aliquot sum) s(n): 873026968
• 668733728 is an abundant number, because the sum of its proper divisors (873026968) is greater than itself. Its abundance is 204293240

Bases of 668733728

• Binary: 100111110111000001000100100000₂
• Hexadecimal: 0x27DC1120
• Base-36: B25A8W

Squares and roots of 668733728

• 668733728 squared (668733728²) is 447204798964777984
• 668733728 cubed (668733728³) is 299060932391206521932644352
• The square root of 668733728 is 25859.8864653347
• The cube root of 668733728 is 874.4824053943

Scales and comparisons

• 668,733,728 seconds is equal to 21 years, 13 weeks, 4 days, 23 hours, 22 minutes, 8 seconds.
• To count from 1 to 668,733,728 would take you about thirty-one years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 668733728 cubic inches would be around 72.9 feet tall.

Recreational maths with 668733728

• 668733728 backwards is 827337866
• The number of decimal digits it has is: 9
• The sum of 668733728's digits is 50
• More coming soon!